91results about "Liquid cushion bearings" patented technology

A method is described for operating a refrigerant circuit that includes a compressor with a driveshaft and one or more gas bearings for supporting the driveshaft. The method includes operating the refrigerant circuit in a first mode which includes supplying gaseous working fluid compressed by the compressor to the one or more gas bearings of the compressor, and the one or more gas bearings using the compressed gaseous working fluid to support the driveshaft. The method includes operating the refrigerant circuit in a second mode which includes supplying liquid working fluid to the one or more gas bearings of the compressor, and the one or more gas bearings using the liquid working fluid to support the driveshaft. A refrigerant circuit includes a compressor, a condenser, an expander, an evaporator, and a controller configured to selectively operate the refrigerant circuit in a least a first mode and a second mode.

A new type of oil cavity recess type static and dynamic pressure thrust bearing, with the development of high speed heavy load cutting technology, heavy equipment gradually to high speed heavy load development, we are more and more high performance requirements of static pressure thrust bearing, but with the increase of speed and load, the lubricating oil film because of the action of shear force and extrusion force, shear heat increases, oil film thin, even in local tribology failure phenomenon, and bearing because of local overheating deformation, resulting in lubricating oil leakage, and lubricating oil viscosity decreases, will produce static pressure loss, therefore, the patent puts forward a new type of oil cavity recess type static and dynamic pressure thrust bearing, so that the static pressure thrust bearing work, oil cavity and rotary workbench guide surface between the total wedge gap, under the condition of rotary workbench high speed rotation, meet the conditions of dynamic pressure effect, use dynamic pressure effect, through the dynamic pressure to make up for the lack of static pressure bearing capacity, in order to achieve the purpose of improving the bearing capacity and stability.

A spherical fluid-film bearing for supporting a rotating shaft includes a first bearing element and a second bearing element positioned along the rotating shaft in opposite orientations. Each bearing element also includes a rotor having bearing surface formed as a spherical segment. Additional stabilizing features may be included in the spherical fluid-film bearing, including mechanical springs, hydraulic pistons and a high pressure lubrication system.

Disclosed is a heating, ventilation, air conditioning and cooling (HVACamp; r) system, the HVACamp; the R system includes a compressor (32), a motor (50) configured to drive a rotor of the compressor, and a bearing configured to support a rotor load of the rotor. The HVACamp; the R system further includes: a normal operation tank configured to supply a fluid in liquid or biphasic form under normal operation conditions to lubricate the bearing or a portion thereof; and a shutdown buffer tank configured to supply a fluid in the form of a vapor to lubricate the plurality of bearings or a portion thereof under abnormal operating conditions.

To provide various methods and systems for a liquid metal bearing assembly.SOLUTION: A liquid metal bearing assembly includes: a fill port fluidly coupled to a liquid metal reservoir of the liquid metal bearing assembly, the fill port including an inlet diameter and an outlet diameter, the outlet diameter smaller than the inlet diameter; and a pin formed to fit the inside of the fill port and prevent liquid metal from leaving the liquid metal reservoir via the fill port.SELECTED DRAWING: Figure 3

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston that connects to the stem and plunger assembly, wherein the main piston exerts the extrusion force on the stem such that the stem moves axially, and at least one piston motor coupled with the stem and configured to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container, wherein the at least one hydraulic motor is configured to drive a rotational movement of the container.

The invention provides a hydrostatic pressure throttling assembly and a closed hydraulic guide rail. The hydrostatic pressure throttling assembly comprises a sliding block base body and a throttling feedback unit. An upper oil pad, a lower oil pad, a left oil pad and a right oil pad are arranged on the four circumferential surfaces of the sliding block base body respectively, and the sliding block base body is further provided with an oil inlet cavity channel for hydraulic oil to pass through. The throttling feedback unit is connected to the oil inlet cavity channel and used for outputting hydraulic oil in the oil inlet cavity channel to the upper oil pad, the lower oil pad, the left oil pad and the right oil pad according to the corresponding preset fluid amount so that an oil film can be formed in at least one position of the upper oil pad, the lower oil pad, the left oil pad and the right oil pad. By optimizing pressure distribution and providing highly flexible flow control, the positioning precision, the movement stability and the load adaptability of the ultra-precision machine tool can be ensured, so that the extremely high machining quality and the long-term running reliability are ensured.

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston that connects to the stem and plunger assembly, wherein the main piston exerts the extrusion force on the stem such that the stem moves axially, and at least one piston motor coupled with the stem and configured to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container, wherein the at least one hydraulic motor is configured to drive a rotational movement of the container. The rotary piston and the stem are configured to rotate and move axially such that the stem moves the billet through the container to extrude a part, and the container and the billet are configured to rotate together while the container does not move axially.

A wind power main-shaft sliding bearing with bidirectional stresses and a wind power generation system are disclosed. The wind power main-shaft sliding bearing includes an outer ring, an inner ring and a tile block. The outer ring has an isosceles trapezoidal cross-section where the inner ring slides. The inner ring has a trapezoidal groove matching the outer ring shape. Symmetrical chutes are in two inner sloping faces of the trapezoidal groove. The tile block is in a cavity between the chute and the outer ring. The face of the tile block near the inner ring is spherical. The tile block separates first and second oil cavities, respectively near the outer and inner rings. Even when the sliding bearing is stressed with a load that deforms the inner ring, the tile block automatically adjusts the tilting angle, thereby avoiding tilting the outer ring due to operating pressure loss.

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston, wherein the main piston exerts the axial extrusion force on the stem, and at least one piston motor to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container configured to drive a rotational movement of the container. The rotary piston and the stem are configured to rotate and move axially such that the stem moves the billet through the container to extrude a part, and the container and the billet are configured to rotate together.

The invention relates to a compressor (20) for generating a compressed air flow for a fuel cell (10), the compressor having a compressor element (21), in particular a compressor wheel, wherein the compressor element (21) is coupled in a rotationally fixed manner to a drive shaft (23), wherein the drive shaft (23) is driven by a motor (22), in particular an electric motor, wherein the shaft (23) is rotatably supported by means of at least one hydrodynamic or hydrostatic sliding bearing (24, 25), wherein the sliding bearing (24, 25) is connected to a lubricant supply (30) via which the sliding bearing (24, 25) is supplied with lubricant in order to generate a hydrodynamic or hydrostatic pressure, wherein the lubricant is water or a fluid mixture having predominantly water, wherein the sliding bearing (24, 25) has a lubricant inlet and a lubricant outlet, wherein lubricant can be introduced into the sliding bearing (24, 25) via the lubricant inlet and can be conducted away from the sliding bearing (24, 25) via the lubricant outlet, and wherein a conducting-away region of the circulation system (30) is arranged in the region of the lubricant outlet. If the entire outlet cross section of the liquid outlet of the sliding bearing (24, 25) is completely covered by the lubricant held in the conducting-away region, then a reliable constructional approach for such a compressor can be achieved.

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston that connects to the stem and plunger assembly, wherein the main piston exerts the extrusion force on the stem such that the stem moves axially, and at least one piston motor coupled with the stem and configured to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container, wherein the at least one hydraulic motor is configured to drive a rotational movement of the container.

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston that connects to the stem and plunger assembly, wherein the main piston exerts the extrusion force on the stem such that the stem moves axially, and at least one piston motor coupled with the stem and configured to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container, wherein the at least one hydraulic motor is configured to drive a rotational movement of the container.

The invention discloses a novel composite throttler and a high-rigidity anti-overturning hydrostatic guideway structure, and belongs to the technical field of precision machinery and hydrostatic pressure, the novel composite throttler and high-rigidity anti-overturning hydrostatic guideway structure comprises a guideway main platform, a first hydrostatic slide block and a second hydrostatic slide block are respectively arranged in the guideway main platform, and the first hydrostatic slide block and the second hydrostatic slide block are respectively provided with a throttler. By the adoption of the novel combined type throttler and the high-rigidity anti-overturning hydrostatic guide rail structure, the characteristics of small hole throttling and thin film feedback throttling are combined, small hole throttling has the capacity of dynamically adjusting liquid resistance along with the flow, and the liquid resistance can be rapidly adjusted under the large load change; the thin film throttling can perform fine adjustment in a small pressure difference environment, so that the guide rail can run stably; and the four-slider hydrostatic guideway test platform is provided with a novel composite throttler, so that the four-slider hydrostatic guideway test platform has the capabilities of high rigidity and anti-overturning moment, thereby improving the motion precision of a linear motion part.

The invention discloses an automatic lubricating system for a static pressure sliding bearing of a mining mill sliding shoe and a control method. The system mainly comprises a flow-adjustable sliding shoe static pressure sliding bearing high-pressure oil supply loop, a flow-adjustable oil tank cooling circulation filtering loop, a flow-adjustable thrust sliding bearing oil supply loop, a sliding shoe ball hole lubrication oil supply loop, an oil tank oil return pollution degree and moisture detection loop and the like. The loop is provided with an adjustable execution element and a detection element, and an automatic control method is adopted, so that the lubricating system meets the requirements of accurate lubricating flow, pressure and temperature of mills of different specifications under different working conditions of different loads, different rotating speeds and the like; the lubricating device has the advantages of high lubricating efficiency, wide matching working conditions, high stability, low maintenance cost, energy conservation, environment friendliness and high production efficiency.

The present invention relates to a wind power main-shaft sliding bearing with bidirectional stresses and a wind power generation system. The wind power main-shaft sliding bearing with the bidirectional stresses includes an outer ring, an inner ring and a tile block. The outer ring has an isosceles trapezoidal cross-section at the sliding place of an inner circle thereof. A trapezoidal groove matching the shape of the outer ring is formed at the corresponding position of the outer circle face of the inner ring. Chutes are formed at the two inner sloping faces of the trapezoidal groove, respectively. The chutes are disposed symmetrically at two sides. The tile block is disposed in a cavity formed between the chute and the inner circle face of the outer ring. The face of the tile block near the inner ring is a spherical face. The tile block divides an oil cavity into a first oil cavity and a second oil cavity. The first oil cavity is near the outer ring. The second oil cavity is near the inner ring. The first oil cavity is injected with a lubricant. The second oil cavity is injected with a high-pressure oil. Even when the sliding bearing is stressed with a large load so that the inner ring of the bearing is deformed, the tile block is capable of automatically adjusting a tilting angle, thereby avoiding the tilting of the outer ring of the bearing due to the loss of an operating pressure, allowing rotation to keep stable and being capable of allowing air gaps between a wind driven generator stator and a wind driven generator rotor to always maintain uniformity.

The present application relates to a kind of non-circular fixed-width curve floating ring oil film damper, including damper journal, damper outer ring and the floating ring between damper journal and damper outer ring, the outer ring of floating ring section is floating ring outer ring fixed-width curve, the inner ring of damper outer ring section is equipped with the damper outer ring fixed-width curve that is adapted to floating ring outer ring fixed-width curve, floating ring and damper outer ring between constitute evenly distributed outer oil film, when floating ring once relative to damper outer ring appears self-rotating tendency in floating process, floating ring outer ring fixed-width curve and damper outer ring fixed-width curve between form multiple wedge-shaped gaps connected head to tail, oil film pressure is greater at gap thinner place, change generated by oil film pressure distribution dynamically generates return torque to floating ring, the present application retains the advantages of floating ring extrusion oil film damper while overcoming the deficiency, solve the defect of floating ring extrusion oil film damper in aero-engine application, it is particularly important for improving the technical maturity and application promotion of FSFDs.

A bearing (1) for radially supporting a propeller shaft (22) of a ship (20) comprises a plurality of lubrication holes (2a, 2b, 2c, 4a, 4b, 4c) extending from an outer surface of the bearing (1) to an inner surface of the bearing (1) to allow a flow of a lubrication medium between the inner surface and the outer surface, the lubrication holes (2a, 2b, 2c, 4a, 4b, 4c) comprise a first set of lubrication holes (2) leading onto the inner surface of the bearing (1) on a first side of the bearing (1) and a second set of lubrication holes (4) leading onto the inner surface of the bearing (1) on a second side of the bearing (1). The bearing (1) further comprises at least one lubrication inlet (8, 11) leading to an inner surface of the bearing (1) and configured to allow a lubrication medium to be introduced onto the inner surface independently of the first set of lubrication holes (2) and the second set of lubrication holes (4).

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston that connects to the stem and plunger assembly, wherein the main piston exerts the extrusion force on the stem such that the stem moves axially, and at least one piston motor coupled with the stem and configured to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container, wherein the at least one hydraulic motor is configured to drive a rotational movement of the container.

A dual-oil-film damping bearing structure with elastic support, which relates to a bearing vibration damping support structure. In order to solve the problem of poor reliability when adding a damping and vibration damping structure to the existing bearing structure. In the damping bearing of the present invention, there is a clearance fit between the inner ring and the rotor, and the inner ring of the damping bearing supports the operation of the rotor with an oil film; the cage bars are semi-circular arcs, and the inner ring and the outer ring are fixed through the cage bars; the inner ring of the damping bearing is fixed on the inner ring, and the outer ring of the damping bearing is fixed on the outer ring. There is a clearance fit between the inner ring and the outer ring of the damping bearing; an oil groove is provided on the inner ring of the damping bearing, and an oil inlet hole is provided on the outer ring of the damping bearing. The positions of the oil holes and the oil grooves correspond to each other, and the sealing installation between the inner ring and the outer ring of the damping bearing is realized through a sealing ring; the bearing seat is positioned and installed on the outer ring of the damping bearing. The beneficial effects are to improve the reliability, increase the power density of the whole machine, realize the vibration damping and frequency shift of the unit, and meet the requirements of high-speed mechanical equipment.

The application relates to a sealing device for an automatic compensation shaft and a use method thereof, which is located between the automatic compensation shaft and a sealing fitting hole, is used for preventing mutual leakage of flow on both sides of the automatic compensation shaft, has a split type sealing module and a compression overlapping sealing module, and controls oil is introduced into the sealing device through damping holes on the split type sealing module and the compression overlapping sealing module to realize hydraulic oil film supporting and lubricating functions, so that reliable low-friction sealing can be realized in a rotating or reciprocating state; the split type sealing module and the compression overlapping sealing module are modularized, split type installation is adopted, and assembly and disassembly are convenient. Compared with the prior art, the application has the advantages of convenient processing, compact structure, simplicity, easy installation, convenient adjustment, simple maintenance, batch production and the like.

A fluid bearing arrangement (9) comprises a first member (10), a second member (20), a pressurized-fluid source connection (31) and a fluid distribution channel network (32). The second member is arranged movable relative to the first member in a predetermined motion direction (40). A first side (11) of the first member have protrusions (13) facing a first side (21) of the second member. A distance (d) between the protrusions and the first side of the second member is smaller than an average distance (D). The first side protrusions encircle a first side first and second area (15, 16). The fluid distribution channel network connects the pressurized-fluid source connection to a respective pocket (42) of the first side first and second areas by means of connection channels (38), comprising a respective flow restriction (34). A mean offset of the first side first and second areas, transverse to the predetermined motion direction.

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a compressor with a gas bearing supplied with compressed gas and a controller. The controller is configured to determine an inlet pressure and outlet pressure of the gas bearing, determine a maximum speed limit based on the inlet pressure and the outlet pressure, and prevent the compressor from operating at a speed that is greater than the maximum speed limit. A method of controlling a compressor includes calculating a maximum speed limit based on an inlet pressure and an outlet pressure of the gas bearing. The method also includes in response to determining that a speed setting is greater than the maximum speed limit, adjusting operation of the compressor such that a speed of the compressor is at or below the maximum speed limit.

Rotating structure (4) for civil applications, which has the following features: - a stationary section (8) and a movable section (12) which is rotatable about an axis of rotation (XX) and is equipped with means for its rotation about the axis of rotation (XX), - wherein the fixed section (8) and the movable section (12) are at least partially opposite in shape at a sliding surface (16) of the movable section (12), wherein the sliding surface (16) has a cylindrical, conical or toric shape with respect to the axis of rotation (XX), - wherein at least one self-centering hydrostatic slider (20) is arranged on the sliding surface (16), - wherein the at least one self-centering hydrostatic slider (20) comprises a fixed base (24) and a hydrostatic support (28) arranged between the base (24) and the sliding surface (16), - wherein the hydrostatic support (28) of the base (24) is associated via a double-acting piston (32) which has two opposing chambers (36, 40), - wherein the hydrostatic support (28) comprises a plate (48) facing directly towards the sliding surface (16), the plate (48) defining four pockets (52, 54, 56, 58) filled with pressurized oil and facing directly towards the sliding surface (16), from which they are separated by an intermediate space (60) filled with pressurized oil having a nominal height, the four pockets (52, 54, 56, 58) being in fluid communication in pairs opposite each other with the chambers (36, 40) of the double-acting piston (32) to cause the axial displacement of the double-acting piston (32) along an actuating axis (SS) when the nominal height of the intermediate space (60) and the oil pressure in the pockets (52, 54, 56, 58) change, thereby causing a rotation of the plate (48) of the hydrostatic support (28) is generated with respect to the sliding surface (16) to create the spaces (60) of the pockets (52, 54, 56,58) to bring to the nominal height and to equalize the pressure in the pockets (52, 54, 56, 58).

Various methods and systems are provided for a liquid metal bearing assembly. In one embodiment, a liquid metal bearing assembly includes a fill port fluidly coupled to a liquid metal reservoir of the liquid metal bearing assembly, the fill port comprising an inlet diameter and an outlet diameter, the outlet diameter smaller than the inlet diameter, and a pin formed to fit inside the fill port and prevent liquid metal from leaving the liquid metal reservoir via the fill port.

The bearing for radially supporting a propeller shaft of a ship includes a plurality of lubrication holes extending from an outer surface of the bearing to an inner surface of the bearing for allowing flow of lubricating medium between said inner surface and said outer surface, said lubrication holes including a first group of lubrication holes opening onto the inner surface of the bearing on a first side of the bearing, and a second group of lubrication holes opening onto the inner surface of the bearing on a second side of the bearing. The bearing further includes at least one lubrication inlet opening onto the inner surface of the bearing and configured to allow introducing lubricating medium onto said inner surface independently from said first group and said second group of lubrication holes.

A fluid bearing arrangement (9) comprises a first member (10), a second member (20), a pressurized-fluid source connection (31) and a fluid distribution channel network (32) The second member is arranged movable relative to the first member in a predetermined motion direction (40). A first side (11) of the first member have protrusions (13) facing a first side (21) of the second member. A distance (d) between the protrusions and the first side of the second member is smaller than an average distance (D). The first side protrusions encircle a first side first and second area (15, 16). The fluid distribution channel network connects the pressurized-fluid source connection to a respective pocket (42) of the first side first and second areas by means of connection channels (38), comprising a respective flow restriction (34). A mean offset of the first side first and second areas, transverse to the predetermined motion direction.

The invention discloses a self-adaptive hydrostatic bearing adaptive to the surface shape change of a track surface, belongs to the technical field of hydrostatic bearings, and is used for providing active one-dimensional attitude compensation on a linear motion platform and a rotary platform when the surface shape of the track surface is changed. The core is that a four-oil-cavity structure is adopted, and a detachable self-feedback throttler is arranged at an oil inlet of each oil cavity; and meanwhile, the bearing seat is connected with the semi-cylindrical supporting block through a pair of conjugated cylindrical matching surfaces. During working, hydraulic oil enters the oil cavity through the self-feedback throttler to form a bearing oil film. The self-feedback throttler can adaptively adjust the flow according to the pressure change of the oil cavity, and the change of the surface shape of the matched track surface of the conjugate cylindrical surface allows the oil pad to slightly deflect in one dimension around the axis. Under the synergistic effect, when the track surface slightly inclines, the pressure distribution of all the oil cavities is dynamically adjusted, active posture compensation is achieved, it is ensured that a stable oil film gap is formed between bearing surfaces, and finally the high bearing capacity and the high supporting rigidity are obtained.

This invention discloses a closed hydrostatic guide rail with adaptive high variable load and its control method, including an oil tank for storing hydraulic oil, the oil tank being connected to an oil circuit mechanism; the closed hydrostatic guide rail further includes: a guide rail mechanism, including a guide rail body, a slider controlled by a linear motor slidably connected to the guide rail body, the slider having multiple oil chambers communicating with the guide rail body; a pulsation damping mechanism, disposed on the pipeline of the oil circuit mechanism; the pulsation damping mechanism includes a spring, the lower end of the spring being connected to a diaphragm. The pulsation damping mechanism of this invention adjusts the preload of the spring by changing the oil pressure, thereby reducing oil pressure pulsation and thus maintaining stable oil pressure and uniform oil film in the oil circuit.

The present invention relates to a graphite lubricated bearing for ships and a preparation method thereof. The method comprises the following steps: pretreatment: adding a polymer precursor and a catalyst into a reactor, and after reaction, obtaining an ultra-high molecular thermosetting resin solution; modification: adding a solid lubricant and an alkali into the ultra-high molecular thermosetting resin solution, and after stirring, obtaining a modified ultra-high molecular thermosetting resin solution; gluing: impregnating the ultra-high molecular thermosetting resin solution onto a frame material to obtain a semi-cured polymer nanocomposite sheet; pressing: placing the semi-cured polymer nanocomposite sheet onto a press and pressing to obtain a graphite lubricated bearing for ships. Compared with the prior art, the present invention has the advantages of having stronger mechanical properties and dimensional stability, while ensuring a lower friction coefficient and volume wear under extreme working conditions.